EcoFlow announced the EcoFlow DELTA Gen4 and EcoFlow RIVER Gen4 portable power station series on November 4, 2026. EcoFlow DELTA Gen4 models offer capacities of 3,072 Wh and 3,763 Wh and have a rated output of 3,600 W. EcoFlow RIVER Gen4 models provide capacities of 256 Wh and 512 Wh.
Snapshot
Company: EcoFlow Technology Inc.
Announcement Date: November 4, 2026
Products: DELTA Gen4 and RIVER Gen4 Series
DELTA Models: DELTA 3000 Gen4 and DELTA 3800 Gen4
DELTA Capacity: 3,072 Wh and 3,763 Wh
DELTA Rated Output: 3,600 W
RIVER Models: RIVER 260 Gen4 and RIVER 520 Gen4
RIVER Capacity: 256 Wh and 512 Wh
EcoFlow, a provider of smart home energy storage solutions headquartered in Shenzhen, Guangdong, China, announced its DELTA Gen4 and RIVER Gen4 Series of portable power stations on November 4, 2026.
The company introduced the models for home backup, outdoor activities, and everyday power requirements. This announcement came before a Miami event that showcased EcoFlow’s TITAN, DELTA Gen4 and RIVER Gen4 products for the US market.
The DELTA Gen4 Series contains the DELTA 3800 Gen4 and DELTA 3000 Gen4, which offer capacities of 3,763 Wh and 3,072 Wh, respectively. The DELTA 3800 Gen4 can be expanded to 12 kWh. Both DELTA Gen4 models provide a rated output of 3,600 W and a surge power of 7,200 W. The X-Boost technology in the DELTA Gen4 series supports appliances that need up to 4,600 W.
The DELTA Gen4 models consume 14 W when no AC load is connected and 3 W while in standby. EcoFlow’s Fridge Runtime Boost technology lets the DELTA 3800 Gen4 run a refrigerator for up to 70 hours while the DELTA 3000 Gen4 can run a refrigerator for up to 58 hours.
The Emergency Power Mode in the DELTA Gen4 series keeps DC power for essential devices even when the battery level shown on the display reaches zero.
The DELTA 3000 Gen4 supports four charging methods and can be fully charged through AC in less than two hours. The DELTA 3800 Gen4 supports six charging methods and can be fully charged through AC in less than 2.5 hours.
The RIVER Gen4 Series includes the RIVER 260 Gen4 and RIVER 520 Gen4, which provide 256 Wh and 512 Wh capacities and output power of 300 W and 500 W. Both RIVER Gen4 models support AC, USB-C, solar, and alternator charging as well as emergency power and UPS functions.
The DELTA 3000 Gen4 and DELTA 3800 Gen4 are available at early‑bird prices of $1,299 and $1,699. Pre‑sales for the RIVER Gen4 series begin on November 24, 2026.